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What is the difference between the primary and secondary immune response?

The Primary Immune Response occurs at first contact with the pathogen.

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Answered by Daisy G. • Biology tutor

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Define the "standard enthalpy change of atomisation".

This is a standard definition question that is relatively common in A level papers.

Answered by Daniel G. • Chemistry tutor

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What are the key steps in the light dependent reaction of photosynthesis?

Light energy from the Sun excites electrons in chlorophyll and the excited electrons are emitted.2. The chlorophyll molecule is now positively charged and chemically less stable. The lost electrons ...

Answered by Aditi A. • Biology tutor

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What are the steps involved in the mark-release-recapture technique and which factors does it rely upon?

Mark-release-recapture is a technique used to estimate the size of a population of a particular species. The steps involved are:1. Capture and count animals.2. Mark them in a way which is not toxic/harmfu...

Answered by Aditi A. • Biology tutor

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